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Duramax DSP5 SOTF Switch Installation Instructions

The switch will have two wires with pre-crimped pins, it does not matter which colored wire goes into which pin as long as you use the two pins listed below. 

 

2001-2004 LB7: Blue ECM Connector
Pin # 49 & pin # 69

 

2004.5-2005 LLY: ECM connector labeled J3
Pin # 32 & pin # 50

 

2006-2010 LBZ/LMM: ECM connector #1 (The bigger of the two)
Pin # 46 & pin # 54

2011-2016 LML: Gray ECM connector J3
Pin # 11 & pin # 35

 

After you've installed the pins into the correct connector location, plug the connector back in and turn the ignition to ON. Press the small white test button on the back of the switch, if one of the LEDs light up you likely have the pins in the correct location.  If none of the LEDs light up you should check your wiring. 

 

The DSP5 switch has one nut and two washers, the smooth washer is to remain on the bottom with the tab located in hole #5.  If it falls out, turn the switch fully to the left (counter clockwise) and place the washer with the pin into hole #5.  Make sure the switch moves exactly 4 positions to the right (clockwise), if not loosen the nut and reposition the pin.

 

Please note:

  • Do not cut a pin off a wire and ground it
  • Loosen the set screw before installing the knob onto the switch
  • Note: square or rectangular pins only go in one way, don't force it. If it's not going in it's likely not orientated the correct way.

 

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